Mountain View, CA - Sometime today, the open-source browser Firefox is expected to pass the one billion download mark.
The figure includes downloads of all versions of the web software, right back to its release in 2004. At the time of writing, it stands at 999,767,512. If you're the sort of person that likes to watch the car milometer roll over, you can watch the number rise here.
The company estimates it will hit the magic figure at around 15.11 UTC today.
The milestone comes just a month after the launch of Firefox 3.5, which received more than four million downloads in its first 24 hours. Last summer, version 3.0 scored double that figure.
Mozilla has created a website to mark the occasion, which will go live on 3 August. It's asking users to think of ways to celebrate.
According to the latest data from Net Applications, Firefox currently has about 22 percent of the global browser market. Internet Explorer still dominates at around 65 percent, but is steadily losing ground.